Andrew measures they amount of a very unstable substance to be 100 moles. the half life of this substance is 3 days(after 3 days, half is gone).

write an exponential function that models this situation where Y is the amount of substance and X is time in days.
use your equation for problem 28 to complete the chart.

2 answers

amount = 100 (1/2)^(t/3) , where t is in days

No idea what problem 28 is, so .....
0=100
3=50
6=25
9=12.5
12=6.25
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